Hub structure for a heat-dissipation fan

ABSTRACT

The present invention is a hub structure for a heat-dissipation fan, comprising a hub; and a plurality of locking parts. Therein, the hub includes a containing space. The locking parts are at the bottom of the containing space. Each locking part comprises a curved surface, a hook extended to the side wall of the containing space, and a leaning part at the end. Accordingly, by the locking parts, a metal sheath for a fan can be locked to a hub and is firmly fixed in the containing space to prevent from looseness or departure.

FIELD OF THE INVENTION

The present invention relates to a hub structure; more particularly, relates to a metal sheath required by a fan being firmly locked in a containing space of a fan hub to prevent from looseness or departure.

DESCRIPTION OF THE RELATED ART

A hub structure according to the prior art (as shown in FIG. 5) comprises a hub 4 having a spindle 41 at the center, a plurality of blades 42 on the outside surface of the hub 4, and a metal sheath with a magnetic object around on the inner surface of the hub. In this way, the above structure can be connected with a fan to guide the air flow.

According to the structure of the prior art, the metal sheath 43 is fixed on the inner surface of the hub 4 by glue-dispensing or expanding-and-shrinking. Though the metal sheath 43 can be fixed in the hub 4 in this way, after a period of time of use, the glue may often be spoiled or the blades may be over-heated for having been run for a long time so that a gap may appear between the metal sheath 43 and the hub 4 to loosen or depart the metal sheath 43 and the hub 4, or, even to make the fan malfunctioned. So, the hub structure according to the prior art can not fulfill the needs of the user on actual use.

SUMMARY OF THE INVENTION

Therefore, the main purpose of the present invention is to provide a plurality of locking parts to lock the metal sheath required by a fan to make the metal sheath be firmly fixed in a containing space of the hub while being prevented from looseness or departure.

To achieve the above purpose, the present invention is a hub structure for a heat-dissipation fan, comprising a hub, a plurality of blades deposited on the outside surface of the hub, and a plurality of locking parts deposited on the inner surface of the hub. Therein, the hub includes a containing space; and the locking parts are deposited on the inner surface of the hub. Each locking part comprises an arc surface; a hook extended from the top of the locking part; and a leaning surface at the end of the hook. Accordingly, a metal sheath required by a fan can be locked by the locking parts so that the metal sheath can be firmly fixed in the containing space of the hub while being prevented from looseness or departure.

BRIEF DESCRIPTIONS OF THE DRAWINGS

The present invention will be better understood from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which

FIG. 1 is a perspective view of an embodiment according to the present invention;

FIG. 1A is an enlargement view of a locking part according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment according to the present invention;

FIG. 2A is a cross-sectional enlargement view of a locking part according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view showing the status of use according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view showing the status of use after assembling with a metal sheath according to an embodiment of the present invention;

FIG. 4A is a cross-sectional enlargement view of a locking part after assembling with a metal sheath according to an embodiment of the present invention; and

FIG. 5 is a cross-sectional view showing the status of use according to an embodiment of the prior art.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The following descriptions of the preferred embodiment are provided to understand the features and the structures of the present invention.

Please refer to FIG. 1 through FIG. 2A, which are a perspective view of an embodiment according to the present invention; an enlargement view of a locking part according to an embodiment of the present invention; a cross-sectional view of an embodiment according to the present invention; and a cross-sectional enlargement view of a locking part according to an embodiment of the present invention. As shown in the figures, the present invention is a hub structure for a heat-dissipation fan, which comprises a hub 1, a plurality of blades 2 and a plurality of locking parts 14 to firmly lock a metal sheath 3, required by a fan, in a hub 1.

The hub comprises a containing space 11; and a plurality of ribs (not shown in the figures) deposited on the bottom of the containing space 11 to strengthen the hub structure.

The blades 2 are deposited on the outside surface of the hub 1 whose number can be even or odd; and they are arranged with a same distance in between whose shape can be an airfoil or whose surface can be a curved surface, a leaning surface or a cambered surface.

The locking parts 14 are deposited on the bottom of the containing space 11 near the side wall of the containing space 11 in a proper distance. Each locking part 14 comprises a cambered surface; a hook 15 extended from the top toward the side wall of the containing space 11; and a leaning part 16 at the end of the hook 15. By the above structure, a hub structure for a heat-dissipation fan is obtained, where a metal sheath 3 can be firmly locked in the containing space 11 of the hub 1 by the locking parts 14 to prevent from looseness or departure.

Please refer to FIG. 3, FIG. 4 and FIG. 4A, which are a cross-sectional view showing the status of use; a cross-sectional view showing the status of use after assembling with a metal sheath; and a cross-sectional enlargement view of a locking part after assembling with a metal sheath, according to an embodiment of the present invention. As shown in the figures, when the present invention is to be locked with a metal sheath 3 required by a fan (which metal sheath 3 can include a magnetic object on the inner surface), the metal sheath 3 is corresponding to the containing space 11 of the hub 1 and then is pushed in to butt the top surface of the metal sheath 3 against the leaning parts 16 at the end of the hooks 15 on the top of the locking parts 14. Then the lock parts 14 are pushed inwardly by the top surface of the metal sheath 3 along the leaning part 16. In the end, the metal sheath 3 is pushed down to the very bottom of the containing space 11 so that the hooks 15 are locked at the inner edge of the metal sheath 3 by the restoring force from the hooks 15. In this way, the assembling of the metal sheath 3 is finished; and the locking parts 14 with leaning surfaces 16 are correspondingly deposited at the inner edge of the metal sheath 3 to lock the metal sheath 3. By doing so, a metal sheath 3 required by a fan is firmly locked in a containing space 11 of a fan hub 1 to prevent from looseness or departure owing to long time of use or being over-heated.

The preferred embodiment herein disclosed is not intended to unnecessarily limit the scope of the invention. Therefore, simple modifications or variations belonging to the equivalent of the scope of the claims and the instructions disclosed herein for a patent are all within the scope of the present invention. 

1. A hub structure for a heat-dissipation fan, comprising: a hub with a containing space; a plurality of blades deposited on an outside surface of said hub; and a plurality of locking parts deposited on an inner surface of said hub, each of which includes a hook extended out from an end of said locking part.
 2. The hub structure according to claim 1, wherein said plurality of locking parts is deposited on a bottom surface of said containing space.
 3. The hub structure according to claim 1, wherein said plurality of locking parts is deposited near a side wall of said containing space.
 4. The hub structure according to claim 1, wherein said hook of each said locking part is extended toward a side wall of said containing space.
 5. The hub structure according to claim 1, wherein said locking part includes a curved surface.
 6. The hub structure according to claim 1, wherein said end of each said locking part includes a leaning part.
 7. The hub structure according to claim 1, wherein a plurality of ribs is deposited at a bottom of said containing space.
 8. The hub structure according to claim 1, wherein each said locking part is deposited away from a side wall of said containing space. 